bevy_slinet

A simple networking plugin for bevy.

Features

• You can choose TCP or UDP protocol. Adding your own protocols is as easy as implementing a few traits.
• Multiple clients/servers with different configs (specifies a protocol, packet types, serializer, etc.)
• De/serialization. You choose a serialization format, packet type (you probably want it to be enum), and receive events with deserialized packets.

Note: Everything in bevy_slinet is feature-gated. Make sure to enable features you need (client, server, protocol_tcp, protocol_udp, serializer_bincode).

Client example

use bevy::prelude::*;
use serde::{Deserialize, Serialize};

use bevy_slinet::client::{ClientPlugin, ConnectionEstablishEvent, PacketReceiveEvent};
use bevy_slinet::packet_length_serializer::LittleEndian;
use bevy_slinet::protocols::tcp::TcpProtocol;
use bevy_slinet::serializers::bincode::{BincodeSerializer, DefaultOptions};
use bevy_slinet::ClientConfig;

struct Config;

impl ClientConfig for Config {
    type ClientPacket = Packet;
    type ServerPacket = Packet;
    type Protocol = TcpProtocol;
    type SerializerError = bincode::Error;
    type LengthSerializer = LittleEndian<u32>;
    fn build_serializer(
    ) -> SerializerAdapter<Self::ClientPacket, Self::ServerPacket, Self::SerializerError> {
        SerializerAdapter::ReadOnly(Arc::new(BincodeSerializer::<DefaultOptions>::default()))
    }
}

#[derive(Serialize, Deserialize, Debug)]
enum ClientPacket {
    String(String),
}

#[derive(Serialize, Deserialize, Debug)]
enum ServerPacket {
    String(String),
}

fn main() {
    App::new()
        .add_plugins(MinimalPlugins)
        .add_plugins(ClientPlugin::<Config>::connect("127.0.0.1:3000"))
        .add_systems(Update, (connection_establish_system, packet_receive_system))
        .run()
}

fn connection_establish_system(mut events: EventReader<ConnectionEstablishEvent<Config>>) {
    for _event in events.read() {
        println!("Connected!");
    }
}

fn packet_receive_system(mut events: EventReader<PacketReceiveEvent<Config>>) {
    for event in events.read() {
        match &event.packet {
            ServerPacket::String(s) => println!("Got a message: {}", s),
        }
        event
            .connection
            .send(ClientPacket::String("Hello, Server!".to_string())).unwrap();
    }
}

Server Example

use bevy::prelude::*;
use serde::{Deserialize, Serialize};

use bevy_slinet::packet_length_serializer::LittleEndian;
use bevy_slinet::protocols::tcp::TcpProtocol;
use bevy_slinet::serializers::bincode::{BincodeSerializer, DefaultOptions};
use bevy_slinet::server::{NewConnectionEvent, ServerPlugin, PacketReceiveEvent};
use bevy_slinet::ServerConfig;

struct Config;

impl ServerConfig for Config {
    type ClientPacket = Packet;
    type ServerPacket = Packet;
    type Protocol = TcpProtocol;
    type SerializerError = bincode::Error;
    type LengthSerializer = LittleEndian<u32>;
    fn build_serializer(
    ) -> SerializerAdapter<Self::ClientPacket, Self::ServerPacket, Self::SerializerError> {
        SerializerAdapter::ReadOnly(Arc::new(BincodeSerializer::<DefaultOptions>::default()))
    }
}

#[derive(Serialize, Deserialize, Debug)]
enum ClientPacket {
    String(String),
}

#[derive(Serialize, Deserialize, Debug)]
enum ServerPacket {
    String(String),
}

fn main() {
    App::new()
        .add_plugins(MinimalPlugins)
        .add_plugins(ServerPlugin::<Config>::bind("127.0.0.1:3000").unwrap())
        .add_systems(Update, (new_connection_system, packet_receive_system))
        .run()
}

fn new_connection_system(mut events: EventReader<NewConnectionEvent<Config>>) {
    for event in events.read() {
        event
            .connection
            .send(ServerPacket::String("Hello, Client!".to_string())).unwrap();
    }
}

fn packet_receive_system(mut events: EventReader<PacketReceiveEvent<Config>>) {
    for event in events.read() {
        match &event.packet {
            ClientPacket::String(s) => println!("Got a message from a client: {}", s),
        }
        event
            .connection
            .send(ServerPacket::String("Hello, Client!".to_string())).unwrap();
    }
}

Note: you should implement keep-alive and disconnection systems yourself, or look at lobby_and_battle_servers example

More examples

Here.

Compatibility table